Feedback :In my redmine,I create projet Shope and tracker Order.I add two new members : Paul and phillips. They are a rôle with all permissions.

For a tracker Order, _I disabled the assignee field and others fields _I keep only category field.

In my project Shope, _I able tracker Order._I add Paul and Phillips._I create two category : Seller and Buyer. I add Paul in Buyer category and Phillips in Seller.

Scenario :Paul create a issue Order "Beer", in project Shope, with category Seller.In "My page" of Paul, you can see issue "beer" in Reported issues.In "My page" of Phillips, you can see issue "beer" in Issue assigned to me.

Paul upgrade a issue Order "Beer", in project Shope, with category Buyer.In "My page" of Paul, you can see issue "beer" in Reported issues.In "My page" of Phillips, you can't see issue "beer" anywher.

Conclusion :Assignee through Category works only once when issue is created.